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INCOME TAXES - Tax Summary of Stockholder Rights Plan (Details) $ / shares in Units, $ in Thousands |  | 12 Months Ended |
--- | --- | --- | ---
Feb. 13, 2013 item $ / shares shares | Dec. 31, 2016 USD ($) | Dec. 31, 2015 USD ($) | Dec. 31, 2014 USD ($)
Rights Plan |  |  |  |
Annual limitation on net operating losses |  | $ 14,284 |  |
Unrecognized tax benefits |  | 27 | $ 56 | $ 81
Unrecognized tax benefits, including accrued interest and penalties |  |  | 140 |
Decrease in unrecognized tax benefits as a result of the expiration of the applicable statutes of limitations within the next twelve months |  | 69 |  |
Accrued interest or penalties related to uncertain tax positions recognized |  | 42 | $ 84 |
Favorable Tax Impact Member |  |  |  |
Rights Plan |  |  |  |
Unrecognized tax benefits, including accrued interest and penalties |  | $ 69 |  |
Series A Junior Participating Preferred Stock |  |  |  |
Rights Plan |  |  |  |
Number of rights for each outstanding share of common stock | item | 1 |  |  |
Number of preferred share purchase rights for each outstanding share of the company's common stock | shares | 0.001 |  |  |
Exercise price (in dollars per right) | $ / shares | $ 9.81 |  |  |
Series A Junior Participating Preferred Stock | Minimum |  |  |  |
Rights Plan |  |  |  |
Threshold percentage of beneficial ownership for significant dilution of ownership interest | 4.90% |  |  |
Current beneficial ownership percentage that will not trigger the preferred share purchase rights unless they acquire additional shares | 4.90% |  |  |
Series A Junior Participating Preferred Stock | Maximum |  |  |  |
Rights Plan |  |  |  |
Beneficial ownership percentage of any person or group, together with its affiliates and associates | 4.90% |  |  |

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